Extending Chemical Perturbations Of The Ubiquitin Fitness Landscape In A Classroom Setting [preprint]
UMass Chan AffiliationsDepartment of Biochemistry and Molecular Pharmacology
deep mutational scanning
Amino Acids, Peptides, and Proteins
Ecology and Evolutionary Biology
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AbstractAlthough the primary protein sequence of ubiquitin (Ub) is extremely stable over evolutionary time, it is highly tolerant to mutation during selection experiments performed in the laboratory. We have proposed that this discrepancy results from the difference between fitness under laboratory culture conditions and the selective pressures in changing environments over evolutionary time scales. Building on our previous work (Mavor et al. 2016), we used deep mutational scanning to determine how twelve new chemicals reveal novel mutational sensitivities of ubiquitin residues. We found sensitization of Lys63 in eight new conditions. In total, our experiments have uncovered a highly sensitizing condition for every position in Ub except Ser57 and Gln62. By determining the Ubiquitin fitness landscape under different chemical constraints, our work helps to resolve the inconsistencies between deep mutational scanning experiments and sequence conservation over evolutionary timescales.
bioRxiv 139352; doi: https://doi.org/10.1101/139352. Link to preprint on bioRxiv service.
Permanent Link to this Itemhttp://hdl.handle.net/20.500.14038/29315
Full author list omitted for brevity. For the full list of authors, see article.
RightsThe copyright holder for this preprint (which was not peer-reviewed) is the author/funder. It is made available under a CC-BY 4.0 International license.
Except where otherwise noted, this item's license is described as The copyright holder for this preprint (which was not peer-reviewed) is the author/funder. It is made available under a CC-BY 4.0 International license.